Glass-drawing apparatus



mgum J. J. BLOXSOM AND E. E. MYERS.

GLASS DRAWING APPARATUS. APPLICATION FILED SEPT. 2. 1919.

4 SHEETS-SHEET I.

FIEJ- W AY wrmsssss mvsu'rons Patnted Apr. 26, 1921.

J. BLOXSOM AND E. E. MYERS.

GLASS DRAWING APPARATUS.

APPLICATION FILED SEPT- Z, 19l9.

Patented Apr. 26, 1921.

4 SHEETS-SHEET 2- INVENTORS WITNESSES L BLOXSOM AND E. E. MYERS.

GLASS DRAWING 'APEARATUS.

APPLICATION FILED SEPT- 2, I919.

Patented Apr. 26, 1921.

4 SHEETS-SHEET 3 FIB-4;

J. J. BLOXSOM AND E. E. MYERS.

GLASS DRAWING APPARATUS APPLICATION FILED SEPT. 2, I919.

Patented Apr. 26, 1921.

4 SHEETSSHEET 4.

FlI3.E

INVENTORS WITNESSES UNITED STATES PATJENT OFFICE.

JOHN J. BLOXSOM AND ELMER E. MYERS, OF BROOKVILLE, 1?ENNSYLVANIA.v

GLASS-DRAWING APPARATUS.

Specification of Letters Patent.

Patented Apr. 26, 1921.

Applicationfiled September 2, 1919. Serial No. 321,103.

To all whom it may concern:

Be it known that we, JOHN J. BLoXsoM and ELMER E. MYERS, residing atBrookpoint of draw, and has particularly to do with apparatus in which acarrier is provided with a molten glass container and is movable tocause the container to be brought to and from drawing position.

The object of the invention is to improve the air supplyingapparatus tothe end that adequate conduit connections may be automatically made andbroken at the point of draw, and to the further end that the air supplyconduit may be automatically openedto periodically free it ofaccumulations of broken glass or other foreign matter. In theaccompanying sheets of drawlngs which form part of this specificationthe preferred embodiment of the invention is illustrated. vFigure 1 is acombined elevation and central sectional view of glass drawingapparatus; Fig. 2 a plan view of the carrier or turn table shown in Fig.1, the general plane of view being indicated by the line II-II, Fig. 1;Fig. 3 a side view to enlarged scale of means used for connect- ..ingthe air conduits; Fig. 4a. view of the right side of Fig. 3; Fig. 5 asectional view taken 011 the line V-V, Fig. 3; Fig. 6v a side view ofthe means for opening the bottom of the air supply conduit; and Fig. 7 aplan view ofthe parts shown in Fig. 6.

In the apparatus shown in the drawings, the carrier for the molten glasscontainers is a turn table 1, and the containers arranged upon the topof the table are in the form of pots 2 into which molten glass is ladledprior to a draw. After a cylinder has been drawn from a pot of glass atthe drawing station, the table is turned so that the pot previously atthe drawing station is moved to a pot-heating station, at which theglass remaining in the pot is melted and subsequently drained from thepot. The drawing of the glass may, as shown in Fig. 1, be effected by abait 3 secured to a frame a tween these conduits.

position.

4 vertically movable upon guides 5 by means of a hoisting cable 6. Atthe potheatlng station, or stations (there being two such stationsindicated in the drawings), the pots are heated by gas or other fluidfuel burners 7 a hood 8 being provided to confine the heat.

For blowing a cylinder at the drawing station, air is supplied through aconduit 9, which is in fixed position at the drawing station, and aconduit 10, on of hi h tends centrally. through each pot 2 and throughthe portion of the table below it. heir a pot is at the drawing station,its conduit 10 registers with the fixed conduit or supply pipe 9. Means,operated by the movement of the table, are provided for making andmaintaining the connection be- As shown particularly in Figs. 3,4 and 5,one of the conduits, preferably the conduit 9, is provided with a sleeve11 having a laterally projecting flange 12, such sleeve telescopingwith, and bemg longitudinally movable within, the conduit 9. To move theflanged sleeve upwardly into engagement with the conduit 10, there ispreferably provided a pivoted lever 13, oneend of which has a yoke 14adapted to engage the sleeve. Attached, preferably to the 1ower= faceof. the turn table 1, there are a series of springs 15, one adjacent toeach of the pots 2. As a pot approaches the drawing station, the spring15 adjacent to such pot engages the outer end of the lever 18 and movesit downwardly with the result that the inner end of the lever raises thesleeve 11, 12, and holds it yieldingly against the bottom of theconduit,10 as long as the pot is in :drawing placed at the outer edge ofthe turn table, as indicated in the drawin so that they will not besubjected to the heat of the burner 7.

In glass drawing apparatus of the general character contemplated hereinit occasionally happens that particles of broken glass fall through theconduit 10 into the conduit 9, and such particles interfere with properblowing and drawing cylinders. To overcome this difliculty means areprovided for automatically opening the air supply conduit to permit thedischarge of broken glass from it. To such end the conduit 9 ispreferably provided with a downwardly ex- The springs 15 are preferablvtending projection cut obliquely at its lower open end, as shownparticularly in Figs. 6 and 7. Pivoted to the end of this projection,there is a closure 17 provided with an arm 18 attached to one end of asecond and counterweighted arm 19. The other end of the arm 19 has apin-and-slot connection with the lower end of vertically reciprocablerod 20, the upper end of which is adapted to be engaged by an abutment21 at tached to the lower face of the table 1. While the table 1 may beprovided with but a single abutment 21, there are preferably three suchabutments arranged one between each of the pots 2 so that the conduitexten sion 16 may be opened each time the table is turned to advance thepots a single station.

In operation, the closure 17 is held normally in closed position(indicated in dotted lines in Fig. 6) by reason of the counterweight onthe rod 19. When the table 1 is turned, an abutment 21 presses the rod20 downwardly, with the result that the closure is moved to the fullline position indicated in Fig. 6, in which position the bottom of theconduit extension 16 is opened to permit the discharge of whateverbroken glass or other foreign articles may be in it.

According to the provisions of the Patent Statutes, we have describedthe principle and operation of our invention together with the form ofconstruction which we now consider to represent the best embodimentthereof. However, we desire to have it understood that, within the scopeof the appended claims, our invention may be practiced by other forms ofconstruction than that specifically shown and described herein.

We claim as our invention:

1. In apparatus for drawing glass cylinders, the combination of a turntable provided with a molten glass container, an air conduit having anopen end below said table and extending through said container, an airsupply pipe having an open end below the table, a sleeve at the end ofsaid pipe longitudinally movable thereof to register with the end ofsaid conduit, a pivoted lever engaging said sleeve, and a spring securedto said table and adapted upon the rotation thereof to engage said leverto move said sleeve into engagement with the open end of said conduit.

. 2. In apparatus for drawing glass cylinders, the combination of acarrier provided with a molten glass container and movable to and fromdrawing position, an air conduit extending from below said carrierthrough said container, an air supply pipe below said carrier andadapted to register with said conduit when the container is in drawingposition, and means coordinated with the movement of the container foropening the air supply pipe to permit the discharge of glass therefrom.

3. In apparatus for drawing glass cylinders, the combination of a turntable pro vided with a molten glass container, an air conduit extendingthrough said table and container, a vertically disposed air supply pipebelow said table provided with a bot tom discharge opening, the top ofsaid pipe being adapted to register with the bottom of said conduit whenthe glass container is in drawing position, a closure for said dischargeopening, and means coordinated with the movement of said table foropening said closure to permit the discharge of broken glass from theair supply pipe.

4. In apparatus for drawing glass cylinders, the combination of a turntable provided with a molten glass container, an air conduit extendingthrough said table and container, a vertically disposed air supply pipebelow said table provided with a bottom discharge opening, the bottom ofsaid conduit being adapted to register with the top of said pipe whenthe glass container is in drawing position, a pivoted closure for saiddischarge opening, a lever secured to said closure, and a lever-engagingabutment borne by said table and adapted upon the rotation of the tableto move said lever. to.

open said closure.

In testimony whereof we havehcreunto set our hands.

JOHN J. BLOXSOM. ELMER E. MYERS.

